BleSegment.java

private BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
		@Override
		public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
			super.onConnectionStateChange(gatt, status, newState);
			Log.v(TAG, "Connection State Changed: " + (newState == BluetoothProfile.STATE_CONNECTED ? "Connected" : "Disconnected"));
			if (newState == BluetoothProfile.STATE_CONNECTED) {
				setState(State.CONNECTED);
				gatt.discoverServices();
			} else {
				setState(State.IDLE);
			}
		}

		@Override
		public void onServicesDiscovered(BluetoothGatt gatt,
										 int status) {
			if (status == BluetoothGatt.GATT_SUCCESS) {
				Log.v(TAG, "onServicesDiscovered: " + status);
			}
		}

	};